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Ecology provides the high-quality science that is the foundation of Washington state environmental policy. Our monitoring, assessment, and modeling services provide a data-rich understanding of our state’s land, air, and water. We provide access to that data through reports, databases, maps and user-friendly online tools.

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Rulemaking proposed repeal language (WAC 173-04) 02/04/21

This is proposed rule language to be repealed for WAC 173-04, Practice and Procedure

https://ecology.wa.gov/rulemaking-proposed-repeal-language-wac-173-04-0

Rulemaking proposed language (WAC 173-526) 06/16/10

This is proposed rule language for WAC 173-526 Chapter 173-526 WAC - Cowlitz Water Resources Management Program - WRIA 26

https://ecology.wa.gov/rulemaking-proposed-language-wac-173-526-06-16-1

Rulemaking proposed language (WAC 173-525) 03/02/05

This is proposed rule language for WAC 173-525 Grays-Elochoman Instream Resources Protection and Water Management Program

https://ecology.wa.gov/rulemaking-proposed-language-wac-173-525-03-02-0

Rulemaking proposed language (WAC 173-910) 03/10/16

This is proposed rule language for WAC 173-910 Mercury Containing Lights product Stewardship Program.

https://ecology.wa.gov/rulemaking-proposed-language-wac-173-910-03-10-1

Rulemaking proposed language (WAC 173-566) 01/17/2019

This is proposed rule language for (WAC 173-566) Streamflow Restoration Funding 01/17/2019

https://ecology.wa.gov/rulemaking-proposed-language-wac-173-566-01-17-2

Rulemaking proposed repeal language (WAC 173-422) 01/26/21

This is the proposed rule repeal language for Chapter 173-422 WAC, Motor Vehicle Emission Inspection.

https://ecology.wa.gov/rulemaking-proposed-repeal-language-wac-173-422

Rulemaking proposed repeal language (WAC 173-422A) 01/26/21

This is the proposed rule repeal language for Chapter 173-422A WAC, Motor Vehicle Emission Inspection.

https://ecology.wa.gov/rulemaking-proposed-repeal-language-wac-173-422a

Rulemaking proposed language (WAC 173-50) 4/19/23

This is proposed rule language for WAC 173-50.

https://ecology.wa.gov/rulemaking-proposed-language-wac-173-50-4-19-23

Rulemaking proposed language (WAC 173-446A) 12/22/21

This is the proposed rule language for Chapter 173-446A WAC, Criteria for Emissions-Intensive, Trade-Exposed Industries.

https://ecology.wa.gov/rulemaking-proposed-language-wac-173-446a-12-22-21

Rulemaking proposed language (WAC 173-555) 09/17/14

This is proposed rule language for amendment to WAC 173-555 Water Resources Program in the Little Spokane River basin, WRIA 55.

https://ecology.wa.gov/rulemaking-proposed-language-wac-173-555-09-17-1

Rulemaking proposed language (WAC 173-455) 09-07-22

This is proposed rule language for Chapter 173-455 WAC, Air Quality Fee Rule.

https://ecology.wa.gov/rulemaking-proposed-language-wac-173-455-09-07-22

Rulemaking proposed language (WAC 173-557) 09/17/14

This is proposed rule language for WAC 173-557 Water Resources Management Program (WRMP) for the Spokane River and Spokane Valley Rathdrum Prairie (SVRP) Aquifer.

https://ecology.wa.gov/rulemaking-proposed-language-wac-173-557-09-17-1

Rulemaking Proposed Rule 400 (WAC 173-400; WAC 173-401)

This is the proposed rule for Chapter 173-400 WAC.

https://ecology.wa.gov/rulemaking-proposed-rule-400-wac-173-400-wac-173

Rulemaking proposed language (WAC 173-455) 06/20/18

This is the proposed rule language for WAC 173-455, Air Quality Fee Rule.

https://ecology.wa.gov/rulemaking-proposed-language-wac-173-455-06-20-1

Rulemaking proposed language (WAC 173-460) 06/04/19

This is the proposed rule language for Chapter 173-460 WAC, Controls for New Sources of Toxic Air Pollutants.

https://ecology.wa.gov/rulemaking-proposed-language-wac-173-460-06-04-1

Rulemaking proposed language (WAC 173-455) 07-18-22

This is proposed rule language for Chapter 173-455 WAC, Air Quality Fee Rule.